# File lib/phusion_passenger/admin_tools/memory_stats.rb, line 64
        def apache_processes
                @apache_processes ||= begin
                        if PlatformInfo.httpd
                                processes = list_processes(:exe => PlatformInfo.httpd)
                                if processes.empty?
                                        # On some Linux distros, the Apache worker processes
                                        # are called "httpd.worker"
                                        processes = list_processes(:exe => "#{PlatformInfo.httpd}.worker")
                                end
                                processes
                        else
                                nil
                        end
                end
        end